Telephone was a very important innovation in out history. It changed the world completely and thanks to it, the distance between people wasn´t as significant as it used to be. The world changed even more with the introduction of mobile phones. Thanks to them people are able to communicate with each other from every place of the world. If you think about it it is really amazing. It is almost as if you were able to take everyone with you all the time. On the other hand people are using mobile phones to often and sometimes even prefer such contact with their friends and family. Instead of visiting them, they just call. That is the main drawback of mobile phones in my attention. It is a paradox. It made the distance less significant and at the same time made people more distant to each other. Mobile phones can be used for more purposes than just calling and that is their big advantage. I have even seen theory test applications for mobile phones. That means you can use it also for educational purposes not only for games and music. By doing such test on your mobile phones you are able to prepare yourself for theory test very well. You can take the test everywhere you want with you.